IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
The radiation environment of the young Sun and its implications for life in the Solar System
Autor/es:
ABREVAYA, X.C.; HANSLMEIER, A.; LEITZINGER, M.; ODERT, P.; BUCCINO, A.P.; MAUAS, P.J.D.
Reunión:
Congreso; XIIth Hvar Astrophysical Colloquium; 2012
Resumen:
The current answer about when life originated on the Earth comes from indirect evidences from the microbial fossil record. Accordingly, the first cells arose around 3.800-3.500 million years ago. Despite this, there are some uncertainties about when first cells could have aroused. One limiting condition for life?Ls origin could be related to radiation effects, since it is well known that radiation at certain doses could be very damaging for life, inducing damage to different cellular components which could lead to cell death.  At the Early Earth ages, the Sun was different in several aspects to the present Sun, and solar analogs could provide relevant information about the conditions of the young Sun.  In this work we use the irradiance of three stellar analogs with different ages (?È Ceti, EK Dra and ?Î Uma) during quiescence and flaring to simulate the radiation environment of planetary bodies which are relevant from an astrobiological point of view (Early Earth, Early mars, Early Europa). These values will be used to conduct biological experiments with microorganisms, simulating the radiation environment on these planetary bodies in order to test the probability of the survival, and therefore, the existence of this kind of life at these ages on these planetary bodies.